﻿using System;
using Drill.Configuration;
using Drill.Core.Builders;
using Drill.Extensibility;

namespace Drill.Core.MasterFactories
{
	public class ConfigBasedMasterDrillBitFactory : IDrillBitFactory
	{
		private readonly IDrillBitConfiguration _config;
		private readonly IConfigurationHelper _configurationHelper;

		public ConfigBasedMasterDrillBitFactory(IDrillBitConfiguration config, IConfigurationHelper configurationHelper)
		{
			if (null == config)
			{
				throw new ArgumentNullException("config");
			}
			_config = config;
			_configurationHelper = configurationHelper;
		}

		/// <summary>
		/// Creates a new <see cref="IDrillBit"/> instance.
		/// </summary>
		/// <returns>A new <see cref="IDrillBit"/> instance.</returns>
		public IDrillBit CreateDrillBit()
		{
			if (false == _config.Enabled)
			{
				return null;
			}

			string assemblyQualifiedTypeName = _config.Type;
			string drillBitName = _config.Name;

			IConfigurationSourceSetFactory configurationSourceSetFactory = 
				new ConfigBasedConfigurationSourceSetFactory(_config.ConfigurationSources, _configurationHelper);

			IDrillBitBuilder builder = new DrillBitBuilder(
				drillBitName,
				assemblyQualifiedTypeName,
				configurationSourceSetFactory,
				_configurationHelper
				);

			IDrillBitBuilderDirector director = new DrillBitBuilderDirector();
			director.Initialize(builder);
			return director.Build();
		}
	}
}